Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes  

作　　者：Yixin Yang Wanlei Zhao Ruoxuan Zheng Hongqiang Li Wei Chen Yu-Fei Song 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Quzhou Institute for Innovation in Resource Chemical Engineering,Quzhou 324000,China

出　　处：《Science China Chemistry》2025年第1期209-216,共8页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22178019,22208013,22378012,22288102);the Fundamental Research Funds for the Central Universities(XK1802-6,XK1803-05,XK1902)。

摘　　要：The purification and size sieving of nanoparticles(NPs)represents a significant scientific challenge.Herein,the rGO-polyoxometalates(POMs=PMo_(12),Mo_(132)and Mo_(368))membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction strategy.When the mass ratio of rGO to PMo_(12)was 1:30,the resultant rGO-PMo_(12)membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots(CQDs)separation with a cut-off size approximately 1.0 nm.Further increase of the size of the interlayered POMs from PMo_(12)(1.0 nm),{Mo132}(2.9 nm)to{Mo_(368)}(3.8 nm),the resultant rGO-PMo_(12),rGO-Mo_(132)and rGO-Mo_(368)exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion effect.The results pave a promising way to construct new twodimensional(2D)membranes for highly efficient size-selective separation.

关 键 词：reduced graphene oxide POLYOXOMETALATES membranes gradient separation NANOPARTICLES 

分 类 号：TQ051.893[化学工程] TB383.1[一般工业技术—材料科学与工程]